56) The process of nitrification involves: a. b. c. d. e. The conversion of dini

Question

56) The process of nitrification involves: a. b. c. d. e. The conversion of dinitrogen to ammonia The reduction of organic nitrogen compounds to ammonia The oxidation of ammonia to nitrate The reduction of nitrate to dinitrogen The use of nitrate as a terminal electron acceptor 57) Which chemical form of mercury is responsible for initiating and propagating its bioaccumula aquatic food webs? a. Hg2 b. CH-Hg' c. Hg d. HgS e. None of the above Fill in the blanks according to the corresponding extremophilic characteristic: (answers in the order 1/2/3) 58) 1. Organisms with a growth temperature optimum of 0°C are called 2. Organisms with a growth temperature optimum of 100°C are called 3. Organisms with a growth pH optimum of 2 are called a. thermophiles/mesophiles/alkaliphiles b. mesophiles/thermophiles/halophiles c. psychrophiles/thermophiles/acidophiles thermophiles/psychrophiles/acidophiles e. mesophiles/thermophiles/piezophiles

Explanation / Answer

56. The answer is c. The oxidation of ammonia to nitrate

Biological oxidation of ammonia to nitrite and the oxidaiton of nitrite to nitrate is called as nitrification, it is one of the step in nitrogen fixation, this nitrificaiton is the rate limitation step in nitrogen fixation.

57. The answer is b. CH3-Hg

58. The answer is c. Psychrophiles/Thermophiles/Acidophiles.

Psychrophiles - The organisms which can grow at colder temperatures

Thermophiles - The organisms which can grow at exterme temperatures

Acidophiles - The organims whic can grow at low pH value or at acidic conditions

Related Questions

Navigate

• Browse (All)
• Browse 5
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.